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Note 3 - Loans Receivable and Allowance for Credit Losses on Loans - Schedule of Portfolio Loan Composition (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | --- | --- | --- | --- | ---
Financing Receivable, Gross | $ 2,494,929 |  | $ 2,433,015 |  |  |
ACL on loans | (31,232) | $ (31,238) | (31,534) | $ (30,501) | $ (30,350) | $ (27,992)
Total loans receivable, net | 2,463,697 |  | 2,401,481 |  |  |
Real Estate Portfolio Segment [Member] |  |  |  |  |  |
Financing Receivable, Gross | 1,550,490 |  | 1,530,381 |  |  |
ACL on loans | (14,134) | (14,088) | (14,107) | (12,803) | (12,307) | (12,123)
Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] |  |  |  |  |  |
Financing Receivable, Gross | 352,933 |  | 366,328 |  |  |
Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |  |  |
Financing Receivable, Gross | 292,366 |  | 303,054 |  |  |
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] |  |  |  |  |  |
Financing Receivable, Gross | 75,063 |  | 69,488 |  |  |
Real Estate Portfolio Segment [Member] | One-to-four Family Loan [Member] |  |  |  |  |  |
Financing Receivable, Gross | 591,666 |  | 567,742 |  |  |
Real Estate Portfolio Segment [Member] | Multifamily [Member] |  |  |  |  |  |
Financing Receivable, Gross | 238,462 |  | 223,769 |  |  |
Consumer Portfolio Segment [Member] |  |  |  |  |  |
Financing Receivable, Gross | 632,417 |  | 646,753 |  |  |
ACL on loans | (13,752) | (13,253) | (13,357) | (13,910) | (14,017) | (12,109)
Consumer Portfolio Segment [Member] | Indirect Home Improvement Loan [Member] |  |  |  |  |  |
Financing Receivable, Gross | 552,226 |  | 569,903 |  |  |
Consumer Portfolio Segment [Member] | Marine Loans [Member] |  |  |  |  |  |
Financing Receivable, Gross | 76,845 |  | 73,310 |  |  |
Consumer Portfolio Segment [Member] | Other Consumer Loan [Member] |  |  |  |  |  |
Financing Receivable, Gross | 3,346 |  | 3,540 |  |  |
Commercial Business Portfolio Segment [Member] |  |  |  |  |  |
Financing Receivable, Gross | 312,022 |  | 255,881 |  |  |
ACL on loans | (3,346) | $ (3,897) | (4,070) | $ (3,788) | $ (4,026) | $ (3,760)
Commercial Business Portfolio Segment [Member] | Commercial And Industrial [Member] |  |  |  |  |  |
Financing Receivable, Gross | 296,773 |  | 238,301 |  |  |
Commercial Business Portfolio Segment [Member] | Warehouse Lending Loan [Member] |  |  |  |  |  |
Financing Receivable, Gross | $ 15,249 |  | $ 17,580 |  |  |

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